Right. What's the point in having a guild if you can't use it to waste time during school. :D

Nice! I've seen all the new stuff and like four episodes of the old but I got away from it so I have to go back sometime.
Yes you can never tell on DW if River is gone for good. Technically, they haven't explained how she is linked to Clara (if they do). 
As for Clara - I bet she'll probably stay at least for all of season 8 but you never know. We'll find out next August when it actually starts back up again (or maybe a lot later...)